Something I cannot figure out is... What are the main factors to consider when looking for a great card for crunching numbers? If you compare the 9800gx2 to the GTX 295 co-op for example. The gx2 has a higher gpu clock (600vs576), higher shader clock (1500vs1242), equal memory clocks. The gtx 295 has more memory interface (448bit/gpu vs 256bit/gpu), more processor cores (480vs256), more memory bandwidth (224 GB/s vs 128), more texture filling units (160 vs 128)

The 295 is slower, but seems to have more stuff doing the work. It seems I've seen some who had a lower RAC than me with their 295 wehn I had my 9800gx2, unless they didn't have the co-op edition...I just realized that. So what's the conclusion? I'm just fooling around and don't know whether to get a 295 co-op, or another 280 to pair with what I have....